1 . Chongqing has ______ population in China.

A．the most

B．the biggest

C．biggest

2 . The Yangtze River is one of the ________ (long) rivers in the world.

3 . The ________ (wide) river in the world is the La Plata River (拉普拉塔河) in the south of South America.

4 . Qumolangma is 8,848. 86 meters ________ (high). It’s one of the ________ (popular) places for serious mountain climbers.

5 . I think the Chinese food is _________ (popular) food around the world.

6 . One of the bicycle p________ (部件) is missing. I’m trying to find it.

7 . Kaifeng is one of the ________ (important) tourist cities in Henan.

8 . Protecting ourselves is one of __________ (important) things we must do.

9 . —What’s ________ mountain in the world?
—Qomolangma. It is 8848.86 meters high.

A．higher

B．highest

C．the highest

D．high

10 . Toronto is a large city in Canada. (改为最高级)
Toronto is ________ ________ ________ in Canada.